OBD Guide
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P1074

Mass Air Flow Sensor 2 Signal Too Large

P1074 is an OBD-II diagnostic trouble code meaning: Mass Air Flow Sensor 2 Signal Too Large. Common causes: malfunction of the second mass air flow sensor, open or short circuit in the sensor circuit. Estimated repair cost: $28–89.

Severity
⚠️ Medium
Can you drive?
Yes, but get it checked soon
Approx. repair cost
$28–89 (est.)

Symptoms

  • Unstable engine idling
  • Increased fuel consumption
  • Loss of engine power
  • Check Engine light comes on
  • Dips during acceleration

Causes

  • Malfunction of the second mass air flow sensor
  • Open or short circuit in the sensor circuit
  • Poor contact in the MAF connector
  • Sensor contamination
  • Problems with the ECU

How to Fix

  1. Check the condition of the second mass air flow sensor
  2. Inspect the sensor wiring harness and connectors
  3. Clean the sensor from dirt
  4. Check voltage and resistance in the circuit
  5. Replace the faulty air flow sensor if necessary

Related codes

P1073P1075P0102

FAQ

What does the P1074 code mean?

P1074 is an OBD-II diagnostic trouble code that indicates: Mass Air Flow Sensor 2 Signal Too Large

What causes a P1074 error code?

The most common causes of P1074 include: Malfunction of the second mass air flow sensor; Open or short circuit in the sensor circuit; Poor contact in the MAF connector; Sensor contamination.

How do I fix a P1074 diagnostic trouble code?

To fix P1074: Check the condition of the second mass air flow sensor. Inspect the sensor wiring harness and connectors. Clean the sensor from dirt. For a complete diagnosis, use an OBD-II scanner.

Is it safe to drive with P1074?

Yes, but get it checked soon

How much does it cost to fix P1074?

The estimated repair cost for P1074 is $28–89. Actual cost depends on your vehicle, location, and labor rates.

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See also: Russian version · NationStat